Vulnerability · Published Nov 2, 2026 · Assigned by VulnCheck

CVE-2026-120428PandaWiki 3.65.0 through 3.87.5 Stored XSS via /static-file/ PDF Query-String Bypass

Medium 6.1

In plain English

A medium-severity cross-site scripting in PandaWiki from Chaitin. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities).

Severity (CVSS 3.1)6.1Medium

Exploit odds (30 days)0.4%top 70.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

PandaWiki 3.65.0 through 3.87.5 contains a stored cross-site scripting vulnerability that allows unauthenticated attackers to upload HTML files with image extensions via /share/v1/common/file/upload. Attackers can lure administrators to /static-file/<key>?a=.pdf, bypassing the nginx attachment header to serve HTML inline and steal the panda_wiki_token JWT for session takeover.

Affected products (as reported)

Vendor	Product	Versions
Chaitin	PandaWiki	3.65.0 – through 3.87.5

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

https://github.com/chaitin/PandaWiki/issues/1845 issue-tracking
https://vul.yulun.ac.cn/20261101/pandawiki/ exploit
https://github.com/chaitin/PandaWiki/blob/v3.87.5/web/admin/server.conf technical-description
https://github.com/chaitin/PandaWiki/blob/v3.87.5/backend/usecase/file.go technical-description
https://github.com/chaitin/PandaWiki/blob/v3.87.5/backend/handler/share/common.go technical-description
VulnCheck Advisory: PandaWiki 3.65.0 through 3.87.5 Stored XSS via /static-file/ PDF Query-String Bypass third-party-advisory